ABB SPAC 531 C User Manual And Technical Description page 119

t/s
700
600
500
400
300
200
100
90
80
70
60
50
40
30
20
10
9
8
7
6
5
4
3
2
1
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
1
Fig. 6. Long-time inverse characteristic.
I = measured current
I> = set start current
t = operation time
k = time multiplier
2 3 4 5 6 7 8 9
k
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0.05
I/I>
10 20
17